/// <summary>
/// Stop the service.
/// </summary>
/// <remarks>
/// Clears all the event handlers.
/// </remarks>
public void Stop()
{
// All event handlers are cleared.
QueryReceived = null;
AnswerReceived = null;
NetworkInterfaceDiscovered = null;
// Stop current UDP listener
_client?.Dispose();
_client = null;
}
void FindNetworkInterfaces()
{
Log.LogDebug("Finding network interfaces");
try
{
var currentNics = GetNetworkInterfaces().ToList();
var newNics = new List <NetworkInterface>();
var oldNics = new List <NetworkInterface>();
foreach (var nic in _knownNics.Where(k => !currentNics.Any(n => k.Id == n.Id)))
{
oldNics.Add(nic);
Log.LogDebug($"Removed nic '{nic.Name}'.");
}
foreach (var nic in currentNics.Where(nic => !_knownNics.Any(k => k.Id == nic.Id)))
{
newNics.Add(nic);
Log.LogDebug($"Found nic '{nic.Name}'.");
}
_knownNics = currentNics;
// Only create client if something has change.
if (newNics.Any() || oldNics.Any())
{
_client?.Dispose();
_client = new MulticastClient(UseIpv4, UseIpv6, _networkInterfacesFilter?.Invoke(_knownNics) ?? _knownNics);
_client.MessageReceived += OnDnsMessage;
}
// Tell others.
if (newNics.Any())
{
NetworkInterfaceDiscovered?.Invoke(this, new NetworkInterfaceEventArgs
{
NetworkInterfaces = newNics
});
}
// Magic from @eshvatskyi
//
// I've seen situation when NetworkAddressChanged is not triggered
// (wifi off, but NIC is not disabled, wifi - on, NIC was not changed
// so no event). Rebinding fixes this.
//
// Do magic only on Windows.
#if NET461
if (Environment.OSVersion.Platform.ToString().StartsWith("Win"))
#else
if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
#endif
{
NetworkChange.NetworkAddressChanged -= OnNetworkAddressChanged;
NetworkChange.NetworkAddressChanged += OnNetworkAddressChanged;
}
}
catch (Exception e)
{
Log.LogError("FindNics failed", e);
}
}
